Lathe with rotary tool-head.



` Patented vmay I4, mol. w. von PITTLEB.

LATHE WITH ROTARY TOUL HEAD.

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Patented May I4, 190|.

J. Wl. VON PITTLEB.

LATHE WITH ROTARY TOOL HEAD.

' (Application filed J'uxy 16,4 1896.) (No Model.) 5 Sheets-Sheet 2.

f I [l E: f1-fz Wl- W/TNESSES wg WM No. 674,I77. l Y Patented May I4,|901.

. J. W. VON PITTLER.

LTHE WITH ROTARY TOUL HEAD.

(Application and my 1e, 169e.)

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No. 674,|77. Patented May I4. |9Dl.

J. W. VON PITTLEH.

LATHE WITH ROTARY TDOL HEAD.

(Application med July 18, 1896.)

(No Modal.) 5 Sheets-Sheet 4.

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Patented May yI4, 190|.

No. 6.74m.

^ J. W. YON PITTLER.

l LATHE WITH ROTARY TOOL HEAD. (No Model (Applicazion mea my 1e, rese.)5 Sheetsshet 5 Fly 13.

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UNITED STATES JULIUS WLHELM .VON PITTLEFLOF l PATENT OFFICE.

LElPSlO-GOHLIS, GERMANY, VASSIGNOR TO LEIPZIGER WERKZEUGMASOHINENFABRIK, VORMALS W. VON PIT- TLER, AKTIEN GESELLSCHAFT, OFLElPSlC-WHAHREN, GERMANY.

LATHE WITH ROTARY TOOL-HEAD.

SPECIFICATION forming part of Letters Patent No. 674,177, dated May 14,1901.

I Application filed July 16, 1896. Serial No. 599,451. (No model.)

To @ZZ whom it may concern:

Be it known that I, J ULIUs WILHELM voN PITTLER, a subject of the Kingof Prussia, German Emperor, residing at Leipsic-Gohlis,

Germany, have invented new and useful Improvements in Lathes with RotaryTool- Heads, of which the following isa clear and lexact specification.

This invention relates t0 an im proved lathe ro with rotary tool-headsor turrets, which has the characteristic .that the carriage carrying thetool-head can be moved only longitudinally of the machine but nottransversely thereto and that plane-turning can only be accomplished bythe turning of the tool-head by hand or by means of an automatic motion-Fig. 4 is a side elevation' of my improved lathe, showing the work heldin position in 3o the lathe and one of the tools acting thereon. Fig. 5is a side elevation of the rear portion of the lathe, said figure beingpartly in ver-1 tical longitudinal section on line 5 5, Fig. 2, andshown in the moment when the shifting of the turret-head takes place.

' side elevation, partly in section, on line 6 6, Fig. 2, showing thearrangement of the plane contact. Fig. '7 is a vertical longitudinalsection of the turret-head arranged for turning 4o irregular forms inlongitudinal direction.

Fig. 8 is an end elevation, partly in section,

on line 8 8, Fig. '7.V Fig. 9 is a plan view of the pattern-gage withthe contact-screw used for turning an irregular body of the shape shownin Fig. 7. Fig. lOis a vertical section of the turret-head arranged soas to turn irregular forms in plane direction-that is to say, in a planeparallel with the turret-head.

Fig. ll is an end elevation, partly in section,

Fig. 6 is a on line 11 11, Fig. 10. Fig. 12 is a plan view of thepattern-gage with the contact-screw for turning irregular bodies of theshape shown in Fig. 10. Figs. 13` to 17 show the turret arranged withdifferent kinds oftools, Fig. 13 showing the tools for turning exteriorscrew-threads and finishing them by a separate tool, Fig. 14 showing atool for cutting interior screw-threads, Fig. l5 showing a shaping andfinishing tool, Fig. 16 showing two planing-tools for two separateplanes, and Fig. 17 `showing planing-tools working in one plane.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, Fig. 4., B represents the spindle-supportwhich carries the cone-pulley d and the lathe-spindle b and which isrigidly attached to the bed B of the lathe. The disk-shaped tool-head orturret A is applied to a horizontal shaft D, which is supported insuitable bearings on a longitudinally-moving carriage O.. The shiftingof this carriage is produced by means of a hand-wheel o, to the shaftpcf which is keyed a pinion n, which meshes with a rack m. (Shown inFig. l, 8, and 5.) The `carriage C is guided on an intermediate slide F,which is again guided on suitable Ways of the bedplate B and whichserves for the purpose of permitting the use of the lathe for workpiecesof different lengths. When theintermediate slide F is properly adj ustedto the work-piece N, it is permanently attached to spindle b with theturret-head A for the automatic shifting of the latter in axial direc-'the turret-head A is intended to Vbe moved by hand'in longitudinaldirection.

In the carriage O the shaft Dis mounted parallel with the lathe-spindleb, as shown in Fig. 4. It carries at its front en d a turrethead A,which is provided with socket-'holes u for the insertion of the tools z.To the rear end of the spindle D is applied the .contacthead R, whichsupports several adjustable contact-pins g. Between the journal-bearingsof the shaft D is keyed the toothed shifttion is not intended in thisarrangement, asA

the bed B. A connection of the working ing wheel m, and a drum fu, whichis capable of axial turning motion on the shaft D, is also arrangedbetween said bearings. The drum o carries a bolt "U2, to which the pawlfy, which engages the shifting wheel xt, is pivoted.

For producing the shifting of the tools z at the end of each backwardmotion of turrethead A the drum o is providedavith a curved guideportion or cam fu', along which the pin c, that is attached to the rackm, is guided and which moves in the slot C of the carriage C.

The rack m is acted upon by a strong helical spring r in such a mannerthat during the return motion of the turret-head A the spring r, whichis interposed between the rack 'm and the carriage C, can push back theentire carriage with the turret-head A. A second spring r' is interposedbetween the drum fu and a stop on the bearings of the shaft D andpresses the curved guide o of the drum o toward the pin e, so thatduring the shifting of the rack m and pin c the drum o, with its curvedguide fu', is likewise pressed against the pin c and compelled by thepawl /y to turn on the shaft Das the pin c is moved along the guide o.The length of turning motion is proportionate to the number of tools zwhich are successively to be thrown into action. The turning motioncommences when the lug C2 at the front part of the carriage C abutsagainst the intermediate slide F, in which position the carriage Ccannot be moved farther, and when the rack m commences to slide in thecarriage C, as shown in Fig. l, it continues until the pawl y,controlled by pin c, drops into the next adjacent recess of the toothedwheel as shown in Fig. 5. When the turret-head A is moved again towardthe spindle-stock B,'the rack m, with its pin e, is moved at rst withouttaking the carriage C along, and thereby presses the pin c against thecurved guide fu on the drum U,Whereby the drum 'u and the pawl t/ arereturned into their former positions, so that the pawl y produces theshifting of the turret-head A. As soon as the front end of the rack 'nzabuts against the lug Cof the carriage Cthe rack m moves the carriage C,and thereby the turret A, toward the lathe-spindle b. The shiftingaction of the turret-head can also be accomplished directly by hand bymeans ofthe gear and pinion s, which has a hand-wheel, as shown in Figs.3 and 4.

The turret-head A, the axis of which is, as before mentioned, parallelwith the lathe-spindle b and the motion of which takes place parallel tothe same, is provided, as shown in the drawings, with sixteentool-sockets u, which are made allernately in two different sizes and inwhich the tools are supported by means of set-screws H. On the rearsurface of the turret-head A is arranged a circular groove h forreceiving adjustable stops h', provided with contact-pins h, whichabutagainst the adjustable index 7a (shown in Figs.2 and 6) and whichlimits the motion of the turret-head in axial direction in planeturning, drilling, and similar work.

The stop-bolt 7a in Fig. 14 can be withdrawn by the cam-lever w, so thatthe contact-stop 7L during the shifting of the turret-head A ispermitted to pass the stop-bolt 7u'.

The position of the tool-socket u concentric with the axis of thelathe-spindle b is secured by the index-bolt 7c, which enters into theindex-socket t', arranged in the rear surface of the turret-head A, andinto which the bolt 7c' is pressed by a spring 7a2. The indexbolt 7c ispushed back during the return inotion of the carriage C by the pin d outhe intermediate slide F and leverf, which is pivoted to the carriage Cat d', as shown in Figs. 2, 3, and 5. The lever f receives its motion bycontact with the pin CZ. Fig. 5 shows the position of the index-bolt 71;when the same is withdrawn from the index-socket 'L'.

The contact-head R at the rear end of the shaft D carries thecontact-pinsg, which abut against the adjustable contact-pin g on theintermediate slide F. The number of contact-pins g is equal lo thenumber of tools in the turret-head A, so that each tool which is mountedin the turret-head A has a contactpin g for limiting the motion ofthecarriage in longitudinal direction toward the lathespindle ZJ.

My improved lathe is operated in the following manner: The work-piece Nis held by a chuck M on the lathe-spindle b while the required tools .eare inserted iu their successive order into the turret-head A. The firsttool is now moved forward in the required position and the correspondingcontact-pin g adjusted. (See Fig-t.) ThecarriageCis now moved back bymeans of the hand-wheel o, pinion n, and rack m until the leverf, whichis connected with the index-bolt 7c, abut-s against the pin d on theintermediate piece F, so that the index-bolt is withdrawn from theindex-socket i of the turret-head A. The carriage C then abuts with itslug C2 against the stationary intermediate piece F, so that the carriagecannot be moved farther in backward direction. The spring r, which isinterposed between the rack m and carriage C, is now set to tension forthe reason that the motion of the rack m is continued, though thecarriage C is not moved farther back. Likewise as the rack m continuesits motion on the carriage C the pin c is moved in the slot C', and thecurved guide o on the drum /U is pressed against the pin c under theaction of torsion-spring r, so that the drum fu is compelled by the paWly to be turned suficiently so that the pawl can be dropped into the nextrecess of the ratchet-wheel fr. When the handwheel o is turned in theopposite direction, so that the ratchet-wheel is returned into theinitial position, the pin c is pressed against the curved guide 'u' ofthe drum fu, so that they are both turned together IOO IIO

`as the rack m strikes the lug C2 of the carriage() the latter is movedforward, so that the lever fis released and the index-bolt pressed bythe spring into the socket t of the turret-head A, whereby the latter islocked into position.

If plane-turning or any operation is to be performed in which theturning of the turrethead A by the gear s t is necessary, thecorresponding index-socket i is closed by means of a plug, so that theindex-bolt ccannot enter into the said socket t'. In asimilar mannersome of the spaces between the teeth of the ratchet-wheel arevcovered upwhen it is not desired that the pawl y should drop into the sameand'when several tools .z are to be skipped. By this arrangement of thelathe the result is obtained that with the motion of the tool z the workN is cleared and simultaneously an automatic shifting obtained, wherebyone or more tools Z can be called into action.

The rotary motion imparted to the turrethead A can be utilized forplane-turning, as shown in Figs. 4, 16, and 17; shaping in thelongitudinal direction inside and outside, as

shown in Figs. 7 and 8; shaping in the plane direction, according to -asuitable patterngage E, as shown in Figs. 10 and 11; turning of interiorand exterior screwthreads,-as shown in Figs. 13 and 14, and for drillingand conically turning.

When the turret-head A is moved in longitudinal directionthat is to say,toward the spindle-stock B'-and when simultaneously a regular orirregular axial motion is imparted along a pattern-guide E, the conicalturning or shaping is obtained, as shown in Figs. 7 and 9. When theturret-head A is turned and simultaneously the carriage C, with theturret-head, moved longitudinally along a a pattern E, ordinary shaping,Figs. 10 and 12, is obtained.

By combining several tools z several turnings in longitudinal direction,as well as in the plane direction, can be made in one operation, Figs.16 and 17.

In the following the different work which the machine is capable ofdoing and which is shown in Figs. 7 to 17 is more fully described.

Figs. 7 to 9 show planing in longitudinal direction-t'. e., in thedirection parallel with the lathe-spindle b and to the aXis of theturret-head. In this case the holder L for the guidescrew L is screwedto the turret-head A. The guide-screw L' moves along on au irregularpattern-plate E, so that the turrethead A is compelled to follow theirregular motion imparted thereto.. In the turret-head A are arrangedtwo steel planing-tools z e" for turning off the exterior and interiorof the hollow body N of irregular form, as shown in Fig. 9. During themotion of the carriage C with the turret-head A in longitudinaldirection the turret-head, by the action of the pattern E andguide-screw L', receives simultaneously a lateral oscillating movement,which is transmitted to the tools z a', so that they impart to the bodyN the shape of the pattern-gage E. According as the guide-screw L ismoved along the pattern E or the pattern E (shown in Fig. 8) the turningaction is produced at the inner or outer surface of the work.

Figs. 10 to l2 show the planing action in the direction of a planeparallel with the plane of the turret-head A, as indicated by the arrowin Fig. 11. The guide-screw L, which is attached to the tu rret-head A,moves while the head A is rotated along a guidepattern E, whereby theturret-head follows the irregular motion of the guide-screw L andtransmits the same to the tool z.

Fig. 13 shows the arrangement for cutting screw-threads on the exteriorsurface of the work N. In this case the work N is'inserted into thechuck M, which is screwed on the lathe-spindleb. `(Seealso Figt.) Thethread is rst cut in the rough by the die a, after which the turret-headA is turned by the gear s in the direction of the arrow, so that thefinishing-tool z can complete the thread.V

Fig. 14 shows the corresponding arrangementfor cutting interiorscrew-threads.

Fig. 15 shows the arrangement for shaping the exterior circumference ofthe work N. The turret-head A is rst turned in the direction of thearrow until the previously-adjusted contact-pin h abuts against the boltk', (see also Fig. 6,) whereby the motion of the turret-head A islimited. The turrethead A is then turned in opposite direction until theupper contact-stop h abuts against the contact la', so that theknurling-wheel z' can finish the rim before shaped bythe tool z.

Fig. 16 shows the arrangement for planeturning with severalplane-turning tools z z'. The tools a a are so fastened to theturrrethead A that when the tool z attacks the exterior circumference ofthe work N the tool z attacks the outer circumference of the rim, sothat when the turret-head A is turned in the direction of the arrow bothplanes are completed by one operation of the machine.

Fig. 17 shows the arrangement for plane turning of a surface by means oftwo tools. The tools z z' are so attached to the turrethead A that onetool z commences the turning action on the outer circumference of thework N and the other tool z' attacks the inner circumference of thework, so that the surface can be nished entirely, when by the turning ofthe turret-head Ain the direction of the arrow the tools z z have passedthrough half of the width of the surface, whereby each tool operatesonly on one-half of the entire plane surface. As soon'as this isaccomplished the turret-head A is turned in the IOO IIO

other direction, so that the finishing-tool z2 is set to the Work, whichthen passes over the entire surface.

Having thus described my invention, I claiml. In a turretlathe, thecombination ot the lathe-spindle, a longitudinally-movable carriageprovided With bearings parallel with the lathe-spindle, a rotary,peripherally-toothed, disk-shaped tool-head mounted on said shaft andhaving facial tool-sockets parallel With the lathe-spindle and saidshaft, a pinion meshing with the peripheral teeth of the toolhead, andmeans for turning said pinion so as to drive the tool-head in eitherdirection and permit plane-turning or shaping without a slide-rest,substantially as set forth.

2. In a turret-lathe, the combination of the lathe-spindle, a rotarytool-head provided with tool-sockets on the face which is at rightangles to the lathe-spindle, the axis of which head is parallel with theaxis of the lathespindle, means for rotating said head, indexsockets onthe rear face of the tool-head, an index for said index-sockets, apivoted lever, and a pin against which said lever abuts for automicallyreleasing the index from the socket in which it is engaged when thetoolhead is moved back from the lathe-spindle, substantially as setforth.

3. In a turret-latl1e, the combination With the rotary tool-head, havingan annular guide- Way on its rear face, and a stop h adjustable in saidguideway, of a slide adapted to be moved into the circular path throughwhich said stop travels, substantially as set forth.

4. In a turret-lathe, the combination with a rotary tool-head, and atoothed clutch-Wheel arranged on the axis of the tool-head, of a rotaryspring-actuated sleeve mounted to turn on the axis of said tool-head,means for automatically turning said sleeve, and a pawl pivoted to saidsleeve and adapted to engage the teeth of said clutch-Wheel,substantially as set forth.

5. In a turret-lathe, the combination of a rotary tool-head, the axis ofwhich is parallel with the axis of the lathe-spindle, means forreciprocating the tool-head, a contact-disk carrying contact-pins andsupported on the axis of the tool-head, and means for turning thetool-head in one or the opposite direction, whereby the differentoperations can be executed7 such as plane-turning, shaping, andthread-cutting, substantially as set forth.

In testimony whereof I have signed my name to this speciiication in thepresence of two subscribing` Witnesses.

JULIUS WILHELM VON ll'lTLER.

Witnesses:

RUDOLPH FRIOKE, ANDREW KEINER.

